In Stock

The product is available in our warehouse. You can place the order and you will receive it according to the shipping method.

On Demand

On Demand products are items that we bring to our customers through an order.

So place a normal order and we will ask for them to our suppliers, and will ship to you in just one shipment to save costs. The period may vary from 1 to 3 weeks. When the order is complete, we will ship it to you!.

Back Order

Currently, there is no stock, but we will receive it soon. You can buy it and we will ship the order as soon as it comes back available (normally from 1 to 3 weeks).

Orders that include an On Demand or Back Order item will be shipped when they are available again in one shipment. This means the order will take from 1 to 3 weeks to be shipped once the order is placed You will be notified when adding a backorder product in the cart. If you want to receive first the items in-stock, please, place two different orders separating the in-stock and On Demand or Back Order items.

Retired

This product is only available for search (tutorials, schematics...). They can not be purchased.

Love FLORA but want a bite-sized version? Look no further, GEMMA is a tiny wearable platform board with a lot of might in a 1" diameter package. Powered by a Attiny85 and programmable with an Arduino IDE over USB, you'll be able to realize any wearable project!

NEW In version 2! On March 4, 2015 we released Version 2, which is physically and code-wise identical but has changed the Mini-B connection for a Micro-B USB connector and adds a much-requested On-Off switch!

The Attiny85 is a fun processor because despite being so small, it has 8K of flash, and 5 I/O pins, including analog inputs and PWM 'analog' outputs. We designed a USB bootloader so you can plug it into any computer and reprogram it over a USB port just like an Arduino (it uses 2 of the 5 I/O pins, leaving you with 3). In fact we even made some simple modifications to the Arduino IDE so that it works like a mini-Flora. Perfect for small & simple projects the GEMMA will be your go-to wearable electronics platform.

Even though you can program GEMMA using the Arduino IDE, it's not a fully 100% Arduino-compatible. There are some things you trade off for such a small and low cost microcontroller!

GEMMA does not have a Serial port connection for debugging so the serial port monitor will not be able to send/receive data

Some computers' USB v3 ports don't recognize the GEMMAs bootloader. Simply use a USB v2 port or a USB hub in between

Here are some useful specifications!

Super small, only 1.1" / 28mm diameter and 0.28" / 7mm thick.

Easy-to-sew or solder pads for embedding in your wearable project

Low cost enough, you can use one for every weekend project

ATtiny85 on-board, 8K of flash, 512 byte of SRAM, 512 bytes of EEPROM

Internal oscillator runs at 8MHz

Ultra low power, draws only 9 mA while running

USB bootloader with a nice LED indicator looks just like a USBtinyISP so you can program it with the Arduino IDE (with a few simple config modifications)

Micro-USB jack for power and/or USB uploading, you can put it in a box or tape it up and use any USB cable for when you want to reprogram.

We really worked hard on the bootloader process to make it rugged and foolproof